Update plugin buildConfig to v5.6.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.github.gmazzo.buildconfig	5.6.7 -> 5.6.8

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Release Notes

gmazzo/gradle-buildconfig-plugin (com.github.gmazzo.buildconfig)

v5.6.8

What's Changed

Features

• Renames KMP android unit test source set to androidUnitTest by @​gmazzo in #​276

Dependencies

• Update Gradle Wrapper from 8.14.2 to 8.14.3 by @​gmazzo in #​267
• Update Gradle Wrapper from 8.14.3 to 9.0.0 by @​gmazzo in #​270
• Bump actions/checkout from 4 to 5 by @​dependabot[bot] in #​272
• Bump actions/setup-java from 4 to 5 in /.github/actions/setup-host by @​dependabot[bot] in #​274

Full Changelog: gmazzo/gradle-buildconfig-plugin@v5.6.7...v5.6.8

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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